Vulnerability-Lookup

GHSA-FC2Q-2CF4-P9XR

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-04-24 15:32

Details

In the Linux kernel, the following vulnerability has been resolved:

firmware: arm_scmi: Fix NULL dereference on notify error path

Since commit b5daf93b809d1 ("firmware: arm_scmi: Avoid notifier registration for unsupported events") the call chains leading to the helper __scmi_event_handler_get_ops expect an ERR_PTR to be returned on failure to get an handler for the requested event key, while the current helper can still return a NULL when no handler could be found or created.

Fix by forcing an ERR_PTR return value when the handler reference is NULL.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31544"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-24T15:16:28Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix NULL dereference on notify error path\n\nSince commit b5daf93b809d1 (\"firmware: arm_scmi: Avoid notifier\nregistration for unsupported events\") the call chains leading to the helper\n__scmi_event_handler_get_ops expect an ERR_PTR to be returned on failure to\nget an handler for the requested event key, while the current helper can\nstill return a NULL when no handler could be found or created.\n\nFix by forcing an ERR_PTR return value when the handler reference is NULL.",
  "id": "GHSA-fc2q-2cf4-p9xr",
  "modified": "2026-04-24T15:32:33Z",
  "published": "2026-04-24T15:32:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31544"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/555317d6100164748f7d09f80142739bd29f0cda"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70d9bd9a2e683afe6200b0c20af22f06f1a199a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8414d2800c34528467df23ce6192c254a73e4459"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31544 (GCVE-0-2026-31544)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:33 – Updated: 2026-04-24 14:33

Title

firmware: arm_scmi: Fix NULL dereference on notify error path

Summary

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix NULL dereference on notify error path Since commit b5daf93b809d1 ("firmware: arm_scmi: Avoid notifier registration for unsupported events") the call chains leading to the helper __scmi_event_handler_get_ops expect an ERR_PTR to be returned on failure to get an handler for the requested event key, while the current helper can still return a NULL when no handler could be found or created. Fix by forcing an ERR_PTR return value when the handler reference is NULL.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/70d9bd9a2e683afe6…
	https://git.kernel.org/stable/c/8414d2800c3452846…
	https://git.kernel.org/stable/c/555317d6100164748…

Impacted products

Vendor

Product

Version

Linux

Affected: b5daf93b809d13a194f8a8eeacfab1cfa241bbc3 , < 70d9bd9a2e683afe6200b0c20af22f06f1a199a4 (git)
Affected: b5daf93b809d13a194f8a8eeacfab1cfa241bbc3 , < 8414d2800c34528467df23ce6192c254a73e4459 (git)
Affected: b5daf93b809d13a194f8a8eeacfab1cfa241bbc3 , < 555317d6100164748f7d09f80142739bd29f0cda (git)

Linux

Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/arm_scmi/notify.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "70d9bd9a2e683afe6200b0c20af22f06f1a199a4",
              "status": "affected",
              "version": "b5daf93b809d13a194f8a8eeacfab1cfa241bbc3",
              "versionType": "git"
            },
            {
              "lessThan": "8414d2800c34528467df23ce6192c254a73e4459",
              "status": "affected",
              "version": "b5daf93b809d13a194f8a8eeacfab1cfa241bbc3",
              "versionType": "git"
            },
            {
              "lessThan": "555317d6100164748f7d09f80142739bd29f0cda",
              "status": "affected",
              "version": "b5daf93b809d13a194f8a8eeacfab1cfa241bbc3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/arm_scmi/notify.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.20",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.20",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.10",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix NULL dereference on notify error path\n\nSince commit b5daf93b809d1 (\"firmware: arm_scmi: Avoid notifier\nregistration for unsupported events\") the call chains leading to the helper\n__scmi_event_handler_get_ops expect an ERR_PTR to be returned on failure to\nget an handler for the requested event key, while the current helper can\nstill return a NULL when no handler could be found or created.\n\nFix by forcing an ERR_PTR return value when the handler reference is NULL."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-24T14:33:13.173Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/70d9bd9a2e683afe6200b0c20af22f06f1a199a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/8414d2800c34528467df23ce6192c254a73e4459"
        },
        {
          "url": "https://git.kernel.org/stable/c/555317d6100164748f7d09f80142739bd29f0cda"
        }
      ],
      "title": "firmware: arm_scmi: Fix NULL dereference on notify error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31544",
    "datePublished": "2026-04-24T14:33:13.173Z",
    "dateReserved": "2026-03-09T15:48:24.114Z",
    "dateUpdated": "2026-04-24T14:33:13.173Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-FC2Q-2CF4-P9XR

CVE-2026-31544 (GCVE-0-2026-31544)

Tags

Sightings

Nomenclature